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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '51116d37ef50158d2071bb73fbf1bea53c84430de6791ca19195797bc1eb1ae6' 
  AND token = 'tXZhiG0jY4pt5e1uT4aQhOHX7h8GBTGC+g0RQBgkze8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}